---
type: "LegalText"
title: "41 U.S.C. § 4309"
description: "Burden of proof on contractor"
jurisdiction: "us"
corpus: "united_states_code"
kind: "code_section"
title_number: 41
title_name: "PUBLIC CONTRACTS"
chapter_number: "43"
chapter_name: "ALLOWABLE COSTS"
section: "4309"
citation: "41 U.S.C. § 4309"
status: "current"
release_point: "119-100"
release_date: "2026-06-26"
source: "official"
source_url: "https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc41@119-100.zip"
source_identifier: "/us/usc/t41/s4309"
source_file: "data/legal/raw/us/code/title-41/usc41.xml"
source_hash: "832ea6745330c2bd36b153f90f056b69ec145c13b20b5bb679937cf7c6f65e75"
raw_snapshot_hash: "0977ff7e7fefd99bbd25a86e009a9e4c2707301ec8c49233d17b6604e38702e3"
text_hash: "e932fd20b0be8dc94b5099e4701d0ae926ba73d36da1c28648c1759b2351b3e1"
retrieved_at: "2026-07-04"
confidence: "official"
tags: ["legal", "us-code"]
---

# 41 U.S.C. § 4309 - Burden of proof on contractor

## Text

In a proceeding before a board of contract appeals, the United States Court of Federal Claims, or any other Federal court in which the reasonableness of indirect costs for which a contractor seeks reimbursement from the Federal Government is in issue, the burden of proof is on the contractor to establish that those costs are reasonable.

(Pub. L. 111–350, § 3, Jan. 4, 2011, 124 Stat. 3788.)

## Notes

Historical and Revision Notes RevisedSectionSource (U.S. Code)Source (Statutes at Large) 430941:256(j).June 30, 1949, ch. 288, title III, § 306(j), as added Pub. L. 100–700, § 8(a)(1), Nov. 19, 1988, 102 Stat. 4634; Pub. L. 103–355, title II, § 2151, Oct. 13, 1994, 108 Stat. 3313.